{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,10]],"date-time":"2026-06-10T15:56:15Z","timestamp":1781106975972,"version":"3.54.1"},"reference-count":82,"publisher":"National Academy of Sciences","issue":"25","license":[{"start":{"date-parts":[[2024,6,10]],"date-time":"2024-06-10T00:00:00Z","timestamp":1717977600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/100000002","name":"HHS | National Institutes of Health","doi-asserted-by":"publisher","award":["R01AI149747"],"award-info":[{"award-number":["R01AI149747"]}],"id":[{"id":"10.13039\/100000002","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000002","name":"HHS | National Institutes of Health","doi-asserted-by":"publisher","award":["32GM134721"],"award-info":[{"award-number":["32GM134721"]}],"id":[{"id":"10.13039\/100000002","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000121","name":"NSF | MPS | Division of Mathematical Sciences","doi-asserted-by":"publisher","award":["2235451"],"award-info":[{"award-number":["2235451"]}],"id":[{"id":"10.13039\/100000121","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000893","name":"Simons Foundation","doi-asserted-by":"publisher","award":["MP-TMPS-00005320"],"award-info":[{"award-number":["MP-TMPS-00005320"]}],"id":[{"id":"10.13039\/100000893","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["www.pnas.org"],"crossmark-restriction":true},"short-container-title":["Proc. Natl. Acad. Sci. U.S.A."],"published-print":{"date-parts":[[2024,6,18]]},"abstract":"<jats:p>\n                    Many pathogens evolve to escape immunity, yet it remains difficult to predict whether immune pressure will lead to diversification, serial replacement of one variant by another, or more complex patterns. Pathogen strain dynamics are mediated by cross-protective immunity, whereby exposure to one strain partially protects against infection by antigenically diverged strains. There is growing evidence that this protection is influenced by early exposures, a phenomenon referred to as original antigenic sin (OAS) or imprinting. In this paper, we derive constraints on the emergence of the pattern of successive strain replacements demonstrated by influenza, SARS-CoV-2, seasonal coronaviruses, and other pathogens. We find that OAS implies that the limited diversity found with successive strain replacement can only be maintained if\n                    <jats:inline-formula>\n                      <mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" display=\"inline\" overflow=\"scroll\">\n                        <mml:msub>\n                          <mml:mi>R<\/mml:mi>\n                          <mml:mn>0<\/mml:mn>\n                        <\/mml:msub>\n                      <\/mml:math>\n                    <\/jats:inline-formula>\n                    is less than a threshold set by the characteristic antigenic distances for cross-protection and for the creation of new immune memory. This bound implies a \u201cspeed limit\u201d on the evolution of new strains and a minimum variance of the distribution of infecting strains in antigenic space at any time. To carry out this analysis, we develop a theoretical model of pathogen evolution in antigenic space that implements OAS by decoupling the antigenic distances required for protection from infection and strain-specific memory creation. Our results demonstrate that OAS can play an integral role in the emergence of strain structure from host immune dynamics, preventing highly transmissible pathogens from maintaining serial strain replacement without diversification.\n                  <\/jats:p>","DOI":"10.1073\/pnas.2400202121","type":"journal-article","created":{"date-parts":[[2024,6,10]],"date-time":"2024-06-10T15:00:22Z","timestamp":1718031622000},"update-policy":"https:\/\/doi.org\/10.1073\/pnas.cm10313","source":"Crossref","is-referenced-by-count":3,"title":["A speed limit on serial strain replacement from original antigenic sin"],"prefix":"10.1073","volume":"121","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7598-4225","authenticated-orcid":false,"given":"Lauren","family":"McGough","sequence":"first","affiliation":[{"name":"Department of Ecology and Evolution The University of Chicago, Chicago, IL 60637"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sarah","family":"Cobey","sequence":"additional","affiliation":[{"name":"Department of Ecology and Evolution The University of Chicago, Chicago, IL 60637"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"341","published-online":{"date-parts":[[2024,6,10]]},"reference":[{"key":"e_1_3_4_1_2","doi-asserted-by":"publisher","DOI":"10.1038\/nm0496-437"},{"key":"e_1_3_4_2_2","doi-asserted-by":"publisher","DOI":"10.1126\/science.280.5365.912"},{"key":"e_1_3_4_3_2","doi-asserted-by":"publisher","DOI":"10.1073\/pnas.252512799"},{"key":"e_1_3_4_4_2","doi-asserted-by":"publisher","DOI":"10.1098\/rsif.2007.0229"},{"key":"e_1_3_4_5_2","doi-asserted-by":"publisher","DOI":"10.1126\/science.1090727"},{"key":"e_1_3_4_6_2","doi-asserted-by":"publisher","DOI":"10.1371\/journal.ppat.1003104"},{"key":"e_1_3_4_7_2","doi-asserted-by":"publisher","DOI":"10.1128\/JCM.42.11.5146-5153.2004"},{"key":"e_1_3_4_8_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.jinf.2015.07.007"},{"key":"e_1_3_4_9_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.ebiom.2019.02.054"},{"key":"e_1_3_4_10_2","doi-asserted-by":"publisher","DOI":"10.1038\/s41579-019-0282-6"},{"key":"e_1_3_4_11_2","doi-asserted-by":"publisher","DOI":"10.3201\/eid1811.111457"},{"key":"e_1_3_4_12_2","doi-asserted-by":"publisher","DOI":"10.1038\/nature01509"},{"key":"e_1_3_4_13_2","doi-asserted-by":"publisher","DOI":"10.1126\/science.1097211"},{"key":"e_1_3_4_14_2","doi-asserted-by":"publisher","DOI":"10.1371\/journal.ppat.1009453"},{"key":"e_1_3_4_15_2","unstructured":"K. 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